docker exec -u kehao test-ssh1 bash -c 'ls -l ~'
docker exec -u kehao test-ssh2 bash -c 'ls -l ~'
docker exec -u kehao test-ssh3 bash -c 'ls -l ~'

docker exec -u kehao test-ssh1 bash -c 'rm -rf ~/*'
docker exec -u kehao test-ssh2 bash -c 'rm -rf ~/*'
docker exec -u kehao test-ssh3 bash -c 'rm -rf ~/*'